Another try at photographing smoke. Made some small progress since the last one - I could see smoke in every downloaded image this time, whereas the first time I tried I barely batted 0.500. That's the good news. The bad is the smoke is mostly out of focus. This is going to take more work than I thought.
Flash on camera, 2nd flash very close at 45 degrees to right, black backdrop, ceiling lights (to allow me to see the smoke in order to try to manually focus - I wonder if there's a snowball's chance of getting auto focus on the smoke? Try it and find out.)